I played 4 games in this list, all against juniors, scoring 2.5/4. Their average grade in the August 2009 list was 214.5 and their average grade in this list is 209. My grading performance for these 4 games is between 205 and 210.5(*), which means the average grade of my opponents used in the calculation was between 192.5 and 198.

(*) My new grade is 202 based on 23 games, so between 4635 and 4657 points in total. 19 games were from previous years and scored 3815 points, so the 4 new games must have been between 820 and 842 points.

I played 4 games in this list, all against juniors, scoring 2.5/4. Their average grade in the August 2009 list was 214.5 and their average grade in this list is 209. My grading performance for these 4 games is between 205 and 210.5(*), which means the average grade of my opponents used in the calculation was between 192.5 and 198.

(*) My new grade is 202 based on 23 games, so between 4635 and 4657 points in total. 19 games were from previous years and scored 3815 points, so the 4 new games must have been between 820 and 842 points.

I think the juniors you've played are treated as ungraded. This makes it virtually impossible to predict your grade.

I played 4 games in this list, all against juniors, scoring 2.5/4. Their average grade in the August 2009 list was 214.5 and their average grade in this list is 209. My grading performance for these 4 games is between 205 and 210.5(*), which means the average grade of my opponents used in the calculation was between 192.5 and 198.

(*) My new grade is 202 based on 23 games, so between 4635 and 4657 points in total. 19 games were from previous years and scored 3815 points, so the 4 new games must have been between 820 and 842 points.

I think the juniors you've played are treated as ungraded. This makes it virtually impossible to predict your grade.

You're right that it makes it impossible to predict your grade, but it shouldn't prevent you from checking the calculation of your own new grade once you know what your opponents' new grades are. However, it does. Now I've got the graders' master list I think I can guess what has been done.

One of my opponents had a published grade of 205 in August 2009 and has a published grade of 206 in January 2010, however his performance in the last 6 months was only 180.5 (by scoring 1/5/4 against adults with an average grade of 193). I suspect I have been credited with scoring 1.5/2 against a player graded 180.5, which would almost make the numbers add up.